Bonty ACX
I have them for the winter riding.
Now it's dry I have the lighter lower profiled XDX & I'm going to try RRalfs.
At present very skinny 1.8 XR which are very quick around these parts (Watford) where we have no built-up berms or technical sections to really speak of. On them, I've ridden the red & black routes at Glentress (not recommended) and Dalby plus Cannock's Red routes (just fine).
If you're prepared to ride on skinny tires, it can be a revelation just how quick you can get a shift-on!
Tim

I can wholeheartedly recommend Nobby Nics, I run them 2.4 with snakeskin sidewalls and they are really good all around, being a big tyre though they do drag a little. However i do like a big tyre so have just fitted a 2.4 ralph on the back and 2.4 ron on the front, no snakeskin and no tubes either! (stans kit) which will hopefully work out as my lightweight summer solution. The weight saving with stans is a touch under 400g I just hope they are tough enough as these lightweight schwalbes are very thin at the sides